dyld_info —
Displays information used by dyld in programs and
dylibs
dyld_info |
[-arch arch-name]
[-platform] [-segments]
[-linked_dylibs] [-inits]
[-exports] [-imports]
[-objc] [-fixups]
[-fixup_chains]
[-fixup_chain_details]
[-function_starts]
[-symbolic_fixups]
[-opcodes] [-uuid]
[-dlopens] [-dlsyms]
[-disassemble] [-section
segment-name section-name]
[-all_sections]
[-section_bytes segment-name
section-name]
[-all_sections_bytes]
[-validate_only]
[-no_validate] file(s) |
The dyld_info tool will display information that dyld uses from
binaries. It supports fixups information encoded as opcode based or as
chained fixups.
If the tool is run with no options, it defaults to the common
options (-platform -segments -linked_dylibs).
The tool can be run with paths to dylibs that are in the dyld
cache and not on disk.
The options are as follows:
-arch
arch- Only display the specified architecture. Other architectures in a
universal image are ignored.
-platform- Display the platform (e.g. macOS, iOS) that the binary was built for.
-segments- Display all segments and sections with size info.
-linked_dylibs- Display all dylibs that the binary is linked against.
-inits- Display all static initializers and Objective-C +load methods.
-exports- Display all exported symbols.
-imports- Display all imported symbols.
-objc- Display the Objective-C classes and categories defined.
-fixups- Display a simple table of fixup locations and what dyld will set them
to.
-fixup_chains- If the binary uses chained fixups, displays the format of the chains and
the starts.
- Display the fixup chains header fields.
-fixup_chain_details- Display a table of all the raw fixup chain bits and their meanings.
-symbolic_fixups- Display all fixups, grouped by data symbol.
-shared_region- Displays split-seg information from dylib files that may be placed in the
dyld cache.
-function_starts- Display the offset of all functions starts and their name.
-opcodes- Display all the opcodes used to generate the rebase and binding
information.
-load_commands- Display the load commands in the binary.
-uuid- Display the UUID of the binary.
-function_variants- Display info about function variants in the binary.
-dlopens- Display calls to dlopen() in the binary and if possible the path string
used.
-dlsyms- Display calls to dlsym() in the binary and if possible the symbol string
used.
-disassemble- Display a disassemble of all code sections.
-section
segment-name section-name- Display content of specified section. Content is formatted if the content
type is known.
-all_sections- Display content of all sections. Content is formatted if the content type
is known.
-section_bytes
segment-name section-name- Display content of specified section as hex bytes.
-all_sections_bytes- Display content of all sections as hex bytes.
-validate_only- Display nothing if binary is valid, or information about what parts are
malformed.
-no_validate- Skip validation before inspecting binary.
-all_dir
directory- Will start at specified directory, recursively scan, and run dyld_info on
each file found.
-all_dyld_cache- Will run dyld_info on every dylib in the dyld cache.